Hey, I have been using silly putty for years and I love using it while tripping. I have recently bought some putty off the thinking putty ebay store, it's so sweet I keep buying more. If you buy the one at this link it's a lot softer and more stretchable than regular putty and it's slightly black light responsive. I played for like two hours with it in my bed last time I tripped with he black lights one, so sweet looking and kept seeing visuals in it. Don't worry, looks like crazy aaron keeps relisting this one. http://www.ebay.com/itm/1lb-Reject-...979?pt=LH_DefaultDomain_0&hash=item3cbd73e96b Also It's a sweet deal, 1lb for a few bucks.